【摘要】 为了改善现有的航空弹射救生系统,提出了微爆索线性切割技术在弹射救生系统中的应用。设计了一系列微型爆破索,通过微爆索切割航空有机玻璃的实验研究,观测了有机玻璃层裂现象,得到了不同参数对有机玻璃破坏深度和破坏影响区的影响,确定了微爆索应采用的外壳材料、炸药类型、装药量的范围等参数。运用大型非线性有限元程序LS-DYNA3D对微爆索切割航空有机玻璃进行了数值模拟分析,得到了与实验结果吻合的计算结果,得到微爆索装药量与有机玻璃破坏深度的关系,为合理设计航空救生系统提供了有力依据。更多还原

【Abstract】 In order to improve the present aviation ejection lifesaving system,the application of micro-detonation chord(MDC) in aviation ejection lifesaving system is proposed.A serials of MDC which have different parameters are designed.According to cutting test study of Polymethyl Methacrylate(PMMA),the phenomenon of spallation in PMMA due to MDC cutting is observed.The effects of different parameters of MDC on the damage depth and influence area are obtained.Accordingly the appropriate kinds of materials of half-circular covers,detonator and the range of charge are determined.The numerical simulation on MDC cutting of PMMA is carried out using 3-D explicit element code LS-DYNA3D.The calculation results accords with the experimental data.The relationship between the charge quantity of MDC and the penetration depth of PMMA are obtained.The powerful foundation is supplied for the design of the aviation ejection lifesaving system.更多还原